Perhaps you should try some spelling variations:
hieu sau » hieu su, hieu suat, tieu su
loai hoc » logic hoc, loai khoa, dai hoc
hanh vai » hanh vi, hanh va, hanh tai
sau chat » sat chat, sau chan, soat chat
ky sang » ky nang, ky dang, duy sang
vai cua » dai cua, hai cua, lai cua
ky tang » ky nang, ky dang, kho tang
tu san » thu san, tu ban, tu can
xuc va » tuc va, luc va, xac va
cua te » cua tu

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: tu san ((ky sang) OR (ky tang)) loai hoc. hieu sau chat ((xuc va) or (duc va)) hanh vai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu san ((ky sang) OR (ky tang)) loai hoc. hieu sau chat ((xuc va) OR (duc va)) hanh vai cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu san ((ky sang) OR (ky tang)) loai hoc. hieu sau chat ((xuc va) or (duc va)) hanh vai cua te".
• Adding a wildcard symbol may retrieve word variants: tu san ((ky sang) OR (ky tang)) loai hoc. hieu sau chat ((xuc va) or (duc va)) hanh vai cua te*.